#!/usr/bin/env python
# -*- coding:utf-8 -*-

menu={
	'1.电脑':{
		'1.台式机':['1.苹果','2.联想','3.戴尔'],
		'2.笔记本':['1.macbook','2.thinkpad','3.acer'],
		'3.平板电脑':['1.ipad','2.kingdle','3.surface'],
		'0.返回上级菜单':[]
	},
	'2.手机':{
		'1.ios':['1.ios7','2.ios8','3.ios9'],
		'2.android':['1.小米','2.华为','3.联想'],
		'3.winphone':['1.nokia','2.microsoft','3.xiaomi'],
		'0.返回上级菜单':[]
	},
	'3.家电':{
		'1.电视':['1.三星','2.LG','3.SONY'],
		'2.冰箱':['1.东芝','2.美的','3.海尔'],
		'3.洗衣机':['1.美的','2.松下','3.西门子'],
		'0.返回上级菜单':[]
	},
	'0.退出':[]
}
while True:
	first_list=sorted(menu.keys())
	for first in first_list:
		print first
	input1=int(raw_input('你想看什么？请输入数字选择：'))
	first_select=first_list[input1-1]
	if input1==4:
		break
	else:
		second_list=sorted(menu[first_select].keys())
		for second in second_list:
			print '\t',second

		input2=int(raw_input("请继续选择:"))
		if input2==4:
			continue
